20124113421 has 8 divisors (see below), whose sum is σ = 26837573184. Its totient is φ = 13413364640.

The previous prime is 20124113411. The next prime is 20124113423. The reversal of 20124113421 is 12431142102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20124113421 - 2⁷ = 20124113293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124113423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660360 + ... + 690161.

It is an arithmetic number, because the mean of its divisors is an integer number (3354696648).

Almost surely, 2^20124113421 is an apocalyptic number.

It is an amenable number.

20124113421 is a deficient number, since it is larger than the sum of its proper divisors (6713459763).

20124113421 is a wasteful number, since it uses less digits than its factorization.

20124113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355491.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20124113421 its reverse (12431142102), we get a palindrome (32555255523).

The spelling of 20124113421 in words is "twenty billion, one hundred twenty-four million, one hundred thirteen thousand, four hundred twenty-one".